Windows Media Player DRM is now.

[Robert Bushman]

Window is now configured by default to make backing
up some files impossible without also backing up an
authorization key. Welcome to flavor country.

http://slashdot.org/article.pl?sid=02/08/15/1323206
http://www.guardian.co.uk/Archive/Article/0,4273,4477138,00.html

"I have been collecting music using Windows Media Player to copy from
CDs. When I needed to reformat my hard drive, I copied all my files to
CD-R, re-installed my operating system and copied them back, only to
find my music would not play."

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 "These security related updates may disable your ability
 to copy and/or play Secure Content and use other software
 on your computer." - MS Media Player EULA
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